As psychologist Roy F. Baumeister wrote in his book Willpower: “No matter how rational and high-minded you try to be, you can’t make decision after decision without paying a biological price. It’s different from ordinary physical fatigue—you’re not consciously aware of being tired—but you’re low on mental energy.”11 This state is known as decision fatigue. In other words, the more decisions you have to make, the harder it becomes to make them well. This is why you’re more likely to eat an unhealthy dinner at the end of the day than an unhealthy breakfast at the beginning of the day, when you
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